We're dividing 520903 by 81 
We're looking to find how many times 81 goes into 520903.

Going ahead to step 1:
The number 81 fits into 5 0 times, leaving a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Bring next digit (2) of the dividend behind the 5 and repeat the process: 52 / 81

Advancing to step 2:
When dividing 52 by 81, we get 0 with a remainder of 52.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 52 and we're left with 52.
Include the next digit (0) from the dividend after 52, then repeat: 520 / 81

On to step 3:
When dividing 520 by 81, we get 6 with a remainder of 34.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
If we take 486 away from 520, we end up with 34.
Grab the next digit (9) from the dividend, add it to 34, then carry on: 349 / 81

Moving on to step 4:
81 goes into 349 4 times with a remainder of 25.
Use 4 as the next digit of our solution. 
Result so far: 64.0
Deduct 324 from 349 and we're left with 25.
Grab the next digit (0) from the dividend, add it to 25, then carry on: 250 / 81

Step 5:
If we divide 250 by 81, we get 3 and a remainder of 7.
Use 3 as the next digit of our solution. 
Result so far: 643.0
Subtract 243 from 250 to get 7.
Fetch the next digit (3) from the dividend, attach it to 7 and continue: 73 / 81

Moving on to step 6:
The number 81 fits into 73 0 times, leaving a remainder of 73.
The number 0 becomes the next digit in our result. 
Result so far: 6430.0
Deduct 0 from 73 and we're left with 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Let's proceed to step 7:
The number 81 fits into 730 9 times, leaving a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 6430.9
Deduct 729 from 730 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 8:
If we divide 10 by 81, we get 0 and a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 6430.9
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 9:
100 divided by 81 is 1 with a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 6430.901
If we subtract 81 from 100, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 10:
If we divide 190 by 81, we get 2 and a remainder of 28.
The next digit of our result is 2. 
Result so far: 6430.9012
The remainder is 28 after subtracting 162 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Advancing to step 11:
280 divided by 81 is 3 with a remainder of 37.
Put 3 as the next digit of the answer. 
Result so far: 6430.90123
If we take 243 away from 280, we end up with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

On to step 12:
When dividing 370 by 81, we get 4 with a remainder of 46.
Write down 4 as next digit of the result. 
Result so far: 6430.901234
If we subtract 324 from 370, we get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Let's proceed to step 13:
The number 81 fits into 460 5 times, leaving a remainder of 55.
The next digit of our result is 5. 
Result so far: 6430.9012345
If we subtract 405 from 460, we get 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Advancing to step 14:
550 divided by 81 is 6 with a remainder of 64.
Use 6 as the next digit of our solution. 
Result so far: 6430.90123456
If we subtract 486 from 550, we get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

The final result is 6430.90123456 with a remainder of 6.4e-08.